金属有机框架衍生ZnO,N双化纳米作为稳定的Li金属阳极的有效宿主
Zilong Zhuang1, Fuming Zhang1, Dayakar Gandla1,2
1Department of Materials Science and Engineering, Guangdong Technion-Israel Institute of Technology, Shantou 515063, China.
ACS applied materials & interfaces
|August 3, 2023
概括
研究人员开发了用于金属阳极的ZnO,N双化纳米 (c-ZNCC). 这种新的宿主材料显著改善了沉积,使电池能够稳定循环并保持高容量.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 金属阳极遭受体积膨胀和树突增长,阻碍了电化学可逆性.
- 开发稳定高效的主机对于推进金属电池技术至关重要.
研究的目的:
- 为了合成 ZnO,N 双化纳米 (c-ZNCC) 作为金属阳极的主体.
- 为了研究c-ZNCC宿主的电化学性能和沉积行为.
主要方法:
- 通过核心@外演化机制,使用热带性伊米达酸框架-8 (ZIF-8) 合成c-ZNCC.
- 电化学测试包括剥离/,Tafel斜率分析和静电间歇定位技术 (GITT).
- 制造和测试LNMO水底基c-ZNCC-Li全细胞.
主要成果:
- 该c-ZNCC宿主促进了快速的沉积 (1.5秒) 和快速的离子扩散.
- 在低电压歇斯底里 (95mV在10mA cm−2) 实现了3000小时的稳定剥离/板.
- 在LNMO灯管管子c-ZNCC-Li电池中证明了高效的电荷传输 (低Tafel斜率为3.45 mA cm-2) 和高容量保留 (93.7%在200个循环后的1C).
结论:
- 从金属有机框架中衍生出的c-ZNCC材料,为控制的沉积提供了双重的性位.
- 这种设计为开发用于先进电池的高性能金属阳极提供了有前途的战略.
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